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The Néel transition and magnetic properties of terrestrial, synthetic, and lunar ilmenites

Earth and Planetary Science Letters

By:
, , , , , and
DOI: 10.1016/0012-821X(75)90014-X

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Abstract

The magnetic susceptibility of a terrestrial, synthetic and lunar ilmenite specimen has been measured from 4 to 300 K. All specimens had a single Néel temperature transition which ranged from 56 to 57.7 K. In one case the powdered specimen was partially aligned in the magnetic field prior to the susceptibility measurements and the Néel transition was observed to shift to 60 K indicating magnetic anisotropy. A study of several magnetic parameters calculated from the experimental data showed gross impurities in the terrestrial specimen, single-domain to multi-domain metallic iron in the synthetic specimen, and a small amount of superparamagnetic metallic iron in the lunar sample. No multidomain iron was observed in the lunar ilmenite. The results of electron spin resonance measurements were also in general agreement with these findings. Because of the absence of Fe3+ compared to most terrestrial samples it is suggested that the anisotropic magnetic parameters be determined on lunar ilmenite when a large enough single crystal becomes available.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
The Néel transition and magnetic properties of terrestrial, synthetic, and lunar ilmenites
Series title:
Earth and Planetary Science Letters
DOI:
10.1016/0012-821X(75)90014-X
Volume
26
Issue:
3
Year Published:
1975
Language:
English
Publisher:
Elsevier
Description:
10 p.
First page:
377
Last page:
386
Online Only (Y/N):
N
Additional Online Files(Y/N):
N